sprinkler-image: refactor image
sprinkler-image: refactor image

Move package install list around so that basic stuff
is at the top, followed by the stuff we need for this
image.

Also remove the explicit use of node; my new script
doesn't need it, it may be installed by beaglebone-
getting-started. I don't need it for anything else.

SaskatoonTechworks/meta-techworks